2006/05/31 by Yuval Grossman, Yosef Nir, Guy Raz · 69 citations
Computer Science · Physics and Astronomy · #Algorithm #Computer science #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #VLSI and Analog Circuit Testing #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevlett.97.151801
published in Physical Review Letters 97(15), 151801 (American Physical Society) · V3: Following clarifications by D0, our range for A_{SL} (and consequently for A_{SL}^s) has been modified, strengthening our conclusions. A new figure has been added; 5 pages
arxiv created 2006/07/27 · openalex publication_date 2006/10/10 · arxiv updated 2011/03/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
New physics contributions to Bs\mathrm\text\ensuremath-Bs mixing can be parametrized by the size (rs2) and the phase (2\ensuremathθs) of the total mixing amplitude relative to the standard model amplitude. The phase has so far been unconstrained. We first use the D0 measurement of the semileptonic CP asymmetry ASL to obtain the first constraint on the semileptonic CP asymmetry in Bs decays, ASLs=\ensuremath-0.008\ifmmode±\else\textpm\fi0.011. Then we combine recent measurements by the CDF and D0 Collaborations---the mass difference (\ensuremathΔMs), the width difference (\ensuremathΔ\ensuremathΓs), and ASLs---to constrain 2\ensuremathθs. The errors on \ensuremathΔ\ensuremathΓs and ASLs should still be reduced to have a sensitive probe of the phase, yet the central values are such that the regions around 2\ensuremathθs\ensuremath∼3\ensuremathπ/2 and, in particular, 2\ensuremathθs\ensuremath∼\ensuremathπ/2, are disfavored.